Former Missouri forward Michael Porter Jr. canceled his second pro day in Chicago on Friday because of a strained hip, sources told ESPN. Porter couldn’t get out of bed because of muscle spasms, according to the sources.

We update our mock draft with the latest intel from teams, including Michael Porter Jr.’s recent rise up draft boards.

Saying he is fully healthy after back surgery curtailed his lone season at Missouri, Michael Porter Jr. said Thursday that he’s the best player available in next month’s NBA draft.

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NBA lottery teams were told Wednesday afternoon that the workout had been canceled.

Rescheduling appears to be a possibility depending on how he responds to treatment over the next few days, but there’s no guarantee that occurs with the draft only a week away. Some teams will still send representatives to meet with Porter in Chicago on Friday, according to sources.

NBA teams had been invited to bring their own trainers and doctors to evaluate the former No. 2 high school recruit prior to the start of the now-canceled workout — an unusual step to prove he is healthy.

Regardless, Porter’s camp appears to feel comfortable with his stock. The Sacramento Kings (No. 2), Memphis Grizzlies (No. 4) and Dallas Mavericks (No. 5) are interested in Porter, and it’s now unlikely he falls out of the top seven in the draft, sources tell ESPN.com. The Chicago Bulls hold the seventh pick.

Porter’s draft stock appeared to be trending down after the college basketball season, as his refusal to participate in the NBA combine medical examinations and the postponement of his first pro day — originally scheduled for June 1 and rescheduled to June 8 — caused some teams picking in the late lottery to believe Porter might still be on the board for their pick. Questions about his ability to be a good teammate at Missouri and pre-draft interviews of Porter conducted by NBA teams attending the combine contributed to the concern.

Porter dropping to the late lottery would be a noteworthy turn of events for a player rated so highly in his high school class. For much of 2017, Porter was projected to be one of the top two picks in the 2018 NBA draft.

A back injury revealed in late November derailed Porter’s freshman season, forcing him to have microdiscectomy surgery on his L3 and L4 spinal disks. Porter was cleared to play in March and participated in two games for Missouri, shooting 9-for-29 from the field.

Porter ceased all basketball activity after the season, focusing his efforts on rehab, sources told ESPN, after losing strength in his left leg in particular due to the injury. He was cleared to play just two weeks prior to his June 8 pro day. While he reportedly felt only about 50 percent physically, he had a very impressive showing, according to multiple teams in attendance, shooting the ball exceptionally well. His size, fluidity and shot-making ability off the dribble reminded teams of the player who had been highly touted before the season.

The results of Porter’s full medical examination, conducted by the Bulls, were eventually released to all NBA teams. Representatives of multiple teams that reviewed the information with their medical staffs say those results are encouraging.

“There doesn’t appear to be anything wrong with him right now,” one NBA executive told ESPN.com. “But a conservative doctor could still [be concerned about] what might happen down the road.”

League sources say that NBA doctors appear optimistic about his long-term prognosis, and teams will weigh his talent against the inherent risks.

“Everyone is worried about missing out on a star,” one NBA executive told ESPN. “No one wants to miss out on another Joel Embiid.”